Edit: What I got from this is that Tamatea probably was a man who slid down mountains on his unusually large knees for fun. He would climb back up mountains to slide down again and he sometimes crashed, taking a face full of dirt. He got his nose flute ability (which is more of a whistle) from crashing and eating dirt too much, but his ability probably attracted some girl who likes music.

I'm so shiney

When the walls fell

I used to live near Lake Chargoggagoggmanchauggagoggchaubunagungamaugg.